In it he says that despite suffering the heart attack on Tuesday he’s feeling “buff” and claimed that if anyone else rings to check if he’s ok he would “punch [them] straight in the f***ing head”.

The notorious hardman, who was once an associate of the Kray twins and has a reputation for using a knuckle duster to call in his debts, was only still in hospital because the scanning machine was broken.

He said: ‘Do you honestly believe that I’ve had a f***ing heart attack and it’s going to kill me?’

“Do you honestly believe that I’ve had a f***ing heart attack and it’s going to kill me?

“Let me tell ya, I had a minor heart attack on Tuesday, they was guna let me home on Wednesday but the machine was broken and I couldn’t get a scan so I’ve now gotta stay in here until I get a f***ing scan -which is on Monday.”

Walking around his hospital room dressed in a t-shirt and giant gold chain, claimed there was nothing wrong with him and that there was no chance the heart scare was going to finish him off.

Courtney has previously claimed to have been shot, stabbed and had his nose bitten off, during a life of crime and violence, reports the Sunday Mirror.

The late Frankie Fraser, a gangster and criminal who spent 42 years in behind bars for a string of violent crimes during his time in the south London Richardson gang, previously accused Courtney of trumping up his criminal record.